Well, we definitely know that they were there, released in the hey-day of Acclimatisation Societies, but the last proof of them was in the 1950s. The fact that

Well, we definitely know that they were there, released in the hey-day of Acclimatisation Societies, but the last proof of them was in the 1950s. The fact that no-one saw them while helicopters were beating the bush during the goldrush red deer helicopter hunting years counts against them, but my pet theory is that moose love water, and there's plenty of swamps in Fiordland (if there's a flat bit, it's probably a swamp) to hide from helicopters in.